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Setler [38]
3 years ago
5

(d) Work out 1 4 of 28 kg.

Mathematics
1 answer:
Mariana [72]3 years ago
5 0

Step-by-step explanation:

here \: is \: your \: soution \\  \\ (1 \div 4) \times 28 \\  \\ 28 \div 4 = 7 \\  \\ 7 \: is \: your \: answer \\  \\ hope \: it \: help

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Find the balance of the account using the simple interest formula of I=Prt
prohojiy [21]

Given:

Principal = $1400

Simple rate of interest = 1.25%

Time = 6 month

To find:

The balance of the account after simple interest.

Solution:

The formula for simple interest is

I=\dfrac{P\times r\times t}{100}

Where, P is principal, r is the rate of interest in % and t is time in years.

Time = 6 months

        = \dfrac{6}{12} year

        = 0.5 year

Putting 1400, r=1.25, t=0.5 years.

I=\dfrac{1400\times 1.25\times 0.5}{100}

I=\dfrac{875}{100}

I=8.75

Now, the amount is

A=P+I

A=1400+8.75

A=1408.75

Therefore, the balance of the account after the simple interest is $1408.75.

5 0
3 years ago
The purchase cost of a TV set is $320. If the dealer wants to earn 15% profits, how much should be added into the purchase cost
____ [38]

Answer:

$48

..........................

7 0
3 years ago
Read 2 more answers
15. JAGUARUNDI A jaguarundi springs from a fence post to swat at a low flying bird.
sukhopar [10]

Answer:

The discriminant, -14.71 < 0, shows that there is no solution of the equation, h = -16·t² + 22.3·t + 2, at the line 'h = 10' feet, therefore, the Jaguarundi height as she springs will not be up to 10 feet and therefore she will not reach the bird

Step-by-step explanation:

From the question, the equation that models the Jaguarundi's height, 'h', ma be written approximately as follows;

h = -16·t² + 22.3·t + 2

Where;

t = The time (duration) in seconds

The discriminant of the equation a·x² + b·x + c = 0 is  b² - 4·a·c

When h = 10, we have;

10 = -16·t² + 22.3·t + 2

∴ 0 = -16·t² + 22.3·t + 2 - 10 = -16·t² + 22.3·t - 8

The discriminant of the given quadratic equation is given as follows;

The discriminant = 22.3² - 4 × (-16 × (-8)) = -14.71 < 0

Therefore, the function, h = -16·t² + 22.3·t + 2 has no real root at h = 10

The parabola does not reach or pass through the line h = 10 which is the height at which the bird is flying.

The Jaguarundi will not reach the bird flying at the height of 10 feet.

7 0
3 years ago
Read 2 more answers
Noah assigns a number to each of the 150 athletes at his school and puts the numbers in a box. He randomly chooses 30 numbers an
kumpel [21]

Answer:

90

Step-by-step explanation:

18 out of 30 watched tv

150/30 = 5

18/30 = (18 * 5)/(30 * 5) = 90/150

Answer: 90

6 0
3 years ago
Write an equation for the graph of each line.<br><br>​
emmasim [6.3K]

Answer:

5. y = 2x + 4

6. y = (-1/2)x - 2

Step-by-step explanation:

5. We want to find the slope-intercept form of this, which is y = mx + b, where m is the slope and b is the y-intercept.

Slope is change in y divided by change in x. Here, let's take two random points: (-2, 0) and (0, 4). Then we have:

m = (4 - 0) / (0 - (-2)) = 4 / 2 = 2

The slope is thus 2.

The y-intercept is where the line crosses the y-axis. We see it does so at the point (0, 4), so b = 4.

Our equation is thus: y = 2x + 4.

6. Again, let's find the slope. Pick any two points: (-4, 0) and (0, -2). The slope will be:

m = (-2 - 0) / (0 - (-4)) = -2 / 4 = -1/2

Now, look at the point (0, -2); that's where the line crosses the y-axis, so the y-intercept is b = -2.

Thus, the equation is: y = (-1/2)x - 2.

3 0
4 years ago
Read 2 more answers
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